Question

Help with translation of axes:
I found the angle to be -pi/12 or -15 degrees.

Answer 1

2y^2+sqrt(3)xy-x^2-2=0

Answer 2

i need to get rid of the xy term

Answer 3

the two equations i need are :

x=Xcos(alpha)-Ysin(allpha)

y=Xsin(alpa)+Ycos(alpha)

Answer 4

but how do i work work with that -pi/12